Stop-motion for twisting and winding machines.



PATENTED JAN. 20, 1908'.

H. & J. W. COLLINS. STOP MOTION FOR TWISTING AND WINDING MACHINES APPLICATION FILED MAR. 29. 1902 K0 MODEL lnventorfi,

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HENRY COLLINS AND JOSEPH W. COLLINS, OF PAWTUCKET, RI-IODE ISLAND.

STOP WIIUTION IFOR TWISTING AND WINDING MACHINES.

SPECIFICATION forming part of Letters Patent No. 718,912, dated January 20, 1903.

Application filed March 29, 1902. Serial No. 100,546. (No model.)

To all whom it may concern.-

Be it known that we, HENRY COLLINS and JOSEPH W. COLLINS, residents of the city of Pawtucket, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Stop-Motions for Twisting and Winding Machines; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to that class of mechanical devices called stop-motions, and is an improvement in the stop-motion for twisters set forth in United States Patent No. 517,030, bearing date of March 27, 1894:, in which the operation of the twisting and winding of the yarn was stopped automatically by the separation of the two rolls that drew the yarn from the spools to supply the spindles when one of the strands of which the yarn is composed breaks to prevent the making of imperfect thread.

The object of this additional improvement is to prevent the loose end of the broken strand from catching on the surface of the lower roll when separated and continuing to draw the thread from the spools and wind it up around the roll.

It is fully described and illustrated in this specification and the annexed drawings.

Figure 1 represents a vertical section of a twister taken between two spindles, showing a side View of the thread-detaining device added to the invention described in said patent. Fig. 2 represents a vertical section of most of the devices shown in Fig. 1, taken on line 2 2 in that figure, showing a back view of the sliding vertical plate in its different positions and the plate to which it is attached, with a part of the trough that supports the same.

The parts of the machine not described herein are made substantially as stated in that patent.

In Fig. 1 all the parts are shown in running order to double and twist three yarns to form a single thread and wind it on the spindlebobbin, each spindle and its set of devices being operated independently of the others in the twister, only one set being shown.

A is the end frame of the twister.

O is the top board, and B is the spool-board, held on supports on the board 0 to hold the yarn-spools c c 0. An inverted box D or trough supports the rolls a b, that draw the yarn c from the spools c and deliver it to be twisted and wound on the bobbin f. The bearings of the roll I) are not shown. The top rolla is held in slotted bearings attached to the trough D, the slots allowing the roll a to rise and fall, so as to rest on, the roll I) and cause a friction on the yarn between them sufficient to draw the yarn off of'the spools 0; but when the roll a is raised off of the roll 5 bythe wedges j j, that move forward under the collars h on the journals of that roll, the draft on the yarn ceases. The plate N has horizontal beveled extensions j, which project under the journals of the upper roll 71. to lift it upon the forward movement of the plate N, to which it is attached. This plate N is fixed to the horizontal sliding bolt n, which is actuated through the medium of the revolving fluted roll K when the thread breaks, allowing the lever e to fall and engage it. Through the lower part of this plate N is a guide-pin d, on which this plate slides. This pin is fixed to the trough and serves to hold the plates in an upright position while receiving the forward movement. A shaft 71., having a flanged collar 7c fast on it, held in bearings (not shown) in the trough D, receives a continuous revolving motion in the direction indicated by the arrow below it. When the bolt n is pushed back, the end of the armp will rest in the hollow near the end of the bolt, as seen in Fig. 1, and keep it in place, and the wedges j will be held back, so that the roll a, will bear on the roll I) and draw the yarn from the spools c. To prevent the loose end of the yarn from sticking to the roll 17, which revolves after the upper roll a is raised from it, and winding the yarn around itself, a vertical sliding plate H is attached to the back of the plate Nby means ofabolt passing through the sliding plate and screwing into the vertical plate. (See Fig. 2.)

The sliding clamp-plate H has a V-shaped projecting foot S on its lower end, by which it is raised and held up in place when it is carried back to its normal position. The foot then rests on the top of the trough D, on which it is supported and held up, as long as the bolt 07. and the plate N are held back against said trough. At the same time this clamp-plate is carried back and raised the wedges j are also withdrawn, allowing the rolls a and b to continue feeding the threads. The upper end of this vertically sliding clamp-plate H has a notch or slot E cut into it from one side for the yarn from the spools to pass through to the rolls a and b. (See Fig. l.) The upper edge of this slot forms one biting-jaw and its face is made on an incline. Acorrespondingincline surface is also made on the lower biting-jaw, which is on the upper edge of the stationary clamp-plate E. These inclined surfaces are found in practice to be of great advantage on account of their positive action and increased biting force. When this plate H is up, the notch E would be above the end of the plate N, on which it slides, and the yarn will pass freely through this notch.

A lever a, pivoted at its middle to the plate N, has an arm 6, attached to its inner end, extending down into the trough D over the roll it, and it also has a baro in its front end, bearing against the under side of the thread r. By the breaking of the thread after it has left the rolls the outer end of the lever a will be allowed to rise, and the arm ein its back end will fall and come in contact with one of the flutes or longitudinal ribs on the roll 70, with the result of pushing out the bolt n, raising the roll a, and when the plate N and wedges j are carried forward by the action of the flanged collark and lever 61, the sliding plate H will be allowed to drop of its own gravity and draw the yarn down between itself and plate N and hold it so as to prevent any of it from being wound around the roll Z) if the loose end should catch on that roll.

Having thus described our invention, what we claim, and desire to secure by Letters Pat cut, is-

1. In a stop-motion, the combination of a pair of drawingrolls, a vertically-sliding clamp-plate to bind the yarn when the rolls are separated, said clamp-plate supported at its lower end to hold it up, means for moving the upper roll by mechanism actuated by the breaking of a thread, means for simultaneously giving said clamping-plate a forward movement withdrawing said plate from its support and allowing it to fall and bind the yarn, substantially as described.

2. In a stop-motion, the combination of a pair of drawing-rolls, a vertically-sliding clamp-plate to bind the yarn when the rolls are separated, said clamp-plate slotted at its upper end and having an inclined foot at its lower end by which said clamp-plate is raised and held up in place when in its back or normal position, means for moving the upper roll by mechanism actuated by the breaking of a thread and simultaneously withdrawing said clamp-plate from said support and allowing it to fall and bind the yarn, substantially as described.

3. In a stop-motion, yarn-drawing rolls in combination with a fluted roll, a bolt held in bearings transversely thereto, a vertical plate attached to said bolt and carrying a wedge to raise the upper drawing-roll,a clampplate held to slide vertically on said vertical plate, slotted at its upper end and held up in place by a fixed support at its lower end, a lever controlled by the yarn to cause said fluted roll to actuate the bolt and give said clamp-plate a forward movement thereby releasing it from its support and allowing it to fall and clamp the yarn, substantially as described.

4. In a stop-motion, in combination a pair of drawing-rolls, a wedge fixed to a longitudinally-sliding plate and extending under the bearings of the upper roll, a rotatable fluted roll, a vertical sliding clamp-plate slotted at its upper end and supported at its lower end when drawn back in its normal position, a lever pivotedly connected to said longitudi nally-sliding plate, and controlled by the yarn to cause said fluted roll to drive the wedge forward to raise the upper roll, simultaneously releasing the said clamp-plate to fall and bind the yarn.

5. In a stop-motion the combination of a pair of drawing-rolls, a sliding clamp-plate having an inclined biting-surface on its clamping-jaw, a fixed jaw having a correspondingly-inclined surface for binding the yarn when the rolls are separated, means for moving the upper roll by mechanism actuated by the breaking of a thread, means for simultaneously giving said clamping-plate a forward movement allowing it to fall and bind the yarn, substantially as described.

6. In a stop-motion the combination of' a pair of drawing rolls a ve rticallysliding clamp-plate having an inclined biting-surface on its clamping-jaw, a fixed jaw having a correspondingly-inclined surface for binding the yarn when the rolls are separated, said clamp-plate supported at its lower end to hold it up, means for moving the upper roll by mechanism actuated by the breaking of a thread, means for simultaneously giving said clampingplate a forward movement withdrawing said plate from its support and allowing it to fall and bind the yarn, substantially as described.

7. In a stop-motion, in combination a pair of drawing-rolls a wedge fixed to a longitudinally-sliding plate and extending under the bearing of the upper roll, a rotatable fluted roll having an inclined biting-surface on its clamping-jaw, a fixed jaw having a correspondingly-inclined surface for binding the yarn when the rolls are separated, said clampplate supported at its lower end when drawn IIO backin its normal position, a lever pivotedly connected to said longitudinally sliding plate, and controlled by the yarn to cause said fluted roll to drive the Wedge forward to raise the upper roll, simultaneously releasing the said clam p-plate to fall and bind the yarn, substantially as described.

I In testimony whereof We have hereunto set our hands this 27th day of March, A. D. 1902.

HENRY COLLINS. JOSEPH W. COLLINS. In presence 0f- HOWARD E. BARLOW, l BENJ. ARNOLD. 

